I want to make a 'surprise inside cake' for my grandson, but I will have to make the cake a couple of weeks ahead and freeze it. I've done this before with decorated cakes and not had any problems with icing etc, but this time I want to include some chocolate coins in the centre of the cake. They are the kind that is wrapped in foil.

My question is this - will the chocolate coins be OK once the cake has been defrosted (very slowly) and is ready to eat?

Brookebakescake - these coins are the type you get at Christmas - over an inch wide and wrapped in foil. They'll all be together in a 'secret' hole in the centre of the cake, so they'll be handed out individually once the cake is cut.